George Coetzee moved into a share of the early second-round lead with Henrik Stenson in the BMW International Open in Munich.
He fired his second successive five-under-par 67 to join the Swede on 10-under through halfway.
Stenson led the first round with his course-record eight-under 63, and was able to manage just a two-under-par 70 on the second round as Coetzee began to reel him in.
The Pretoria Country Club professional had three bogeys on his card, or he would have been able to claim the outright lead and set a stiffer target for the afternoon field.
He started his round on the 10th, and was soon in red figures as he eagled the 11th. But a bogey on 15 slowed his progress until he birdied 17.
He picked up another shot immediately after the turn, but dropped again on the second.
His five-hole stretch from four to eight consisted of four birdies Â two on either side of a frustrating bogey six on the sixth.
In the chasing field in the afternoon were JbeÂ Kruger, who opened the tournament with a six-under-par 66, and Retief Goosen, who carded a 68.
Keith Horne looked set to miss the cut as his level-par left him at one-over for the tournament.